Joyride jack-in/connect warns about cljs.repl not found

[PEZ]

When connecting to Joyride (and other CLJS-ish) repls there's an error/warning message:

(require '[cljs.repl :refer [apropos dir doc find-doc print-doc pst source]])

Could not find namespace: cljs.repl.
Jack-in done.

This is part of Calva's default at-start code for ClojureScript. But if the repl does not implement the utilities we get this vanilla error message that causes more confusion than anything else.

One way to solve this for Joyride would be to implement the utilities, but I don't know how much is involved in doing that.